Hello, if you have any questions or need further clarification after reading my answer please let me know.
Thank you for your question.
Your ISA will end on the date of your death. There is no income tax or capital gains tax to pay up to the date of death. There is no need to crystallise these gains for reasons stated by you. Your personal representatives will only have to account for tax on any income or gains arising after your death.
Confirmation of this can be found on HMRC helpsheet under" What happens if I die" here
If you need more information please let me know before you rate my service.
I hope this is helpful and answers your question. If you are happy and there are no more issues I will appreciate if you would kindly rate the service I provided to ensure I get paid for it.
I am available for any follow up questions you may have, and you can use the reply button to post your follow up questions to the page.